Guardrail



FIG. 1 is a front perspective view of a guardrail thereof showing our design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is rear perspective view thereof;

FIG. 9 is a front perspective view of a second embodiment thereof;

FIG. 10 is a front view thereof;

FIG. 11 is a rear view thereof;

FIG. 12 is a left side view thereof;

FIG. 13 is a right side view thereof;

FIG. 14 is a top view thereof;

FIG. 15 is a bottom view thereof; and,

FIG. 16 is rear perspective view thereof.

The dashed broken lines illustrate structure or features which form no part of the claimed design.

The drawings include surface shading which represents contour and not surface ornamentation. 

CLAIM The ornamental design for a guardrail, as shown and described. 